Propane/water/alcohol injection and O2 sensors

[Barry Tisdale]

Ok, so would the below ratios hold for the max rich power area also?  I'm 
injecting 12% methanol, 12% water (1:1 mix @ aprox 24% of fuel) in my 262ci 
Syclone @ 22psi using 93 octane pump gas.  This looks to be pretty close to 
the gasohol mix but its methanol, not ethanol - I'm tuning for WOT AFRs of 
around the widely accepted 12.5:1.  Would it be reasonable to expect max 
power to be around 12.0:1?  As far as I'm able to measure, there's little 
difference in acceleration between 12.0 and 12.5 AFRs, so I think we're 
talking more theoretical here than practical.

BTW, the WB and NB sensors both survived the blown head gasket - replaced 
both, same readings as the 'more experienced' ones.  Apparently, by the 
time the water/glycol mix got thru the manifold, turbo, etc, it must have 
been hot vapor & not liquid, so no severe thermal damage.

Thanks - Barry

At 06:49 PM 4/10/02 -0700, Garfield Willis wrote:
>On Wed, 10 Apr 2002 17:23:49 -0600, Clint Corbin <ccorbin at spinn.net> wrote:
>
> >One very important item you left out: Propane runs a much lower
> >stociametric A/F ratio and gasoline.
>
>Whoops, nope Propane actually has a slightly higher stoich AFR than petrol. I
>posted these some time ago, here they are again:
>
> >Fuel                                           stoich AFR
> >
> >LPG                                                    15.7
> >avg. Petrol                                    14.7
> >10% ethanol (aka gasohol)              14.2
> >straight butyl alc.                            11.2
> >straight ethanol                                 9.0
> >straight methanol                                6.5
> >straight nitromethane                    1.7
> >
> >As they say, "Gas is for cleaning parts. Alcohol is for drinking.
> >Nitro is for racing!." :)
>
>Gar
>
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